In a ruling issued by the U.S. Court of Appeals for the Eighth Circuit in Burlison v. Springfield Public Schools, the court deemed a Missouri school district’s policy of imposing a “lockdown” of the school for the purpose of allowing the local sheriff’s department, aided by drug-sniffing dogs, to perform mass inspections of students’ belongings to be a “reasonable procedure to maintain the safety and security of students at the school,” and not a violation of the Fourth Amendment rights of students.